There was an issue with transferred business returns in some instances. The issue appears to be concentrated in the 2018 returns. Somehow, it was indicated that one or more partners/members left the partnership/LLC or the partnership ended in 2018. Therefore, the 2018 return needs to be checked for errors in that regard.
You can also contact Support (link below) for further information.
https://ttlc.intuit.com/community/using-turbotax/help/what-is-the-turbotax-phone-number/00/25632
